Difficulties in parts search?

Parts list

Difficulties in parts search?

	Description	OEM Part #	Price
72126F	72126F 72114FE010 COVER REAR DUCT 2003-07-01 ~ 2004-06-01; *S.(TS+GX+STI).LH +W.(TS+GX).LH	72114FE010	US $3.40
72126F	72126F 72114FE010 COVER REAR DUCT 2003-07-01 ~ 2004-06-01; *S.(TS+GX+STI).LH +W.(TS+GX).LH	72114FE010	US $3.40
72411	72411 72411FE001 HOSE HTR IN 2003-07-01 ~ 2004-06-01; S.(WRX+STI) +W.WRX	72411FE001	US $14.58
72411	72411 72411FE001 HOSE HTR IN 2003-07-01 ~ 2004-06-01; S.(WRX+STI) +W.WRX	72411FE001	US $14.58
72421	72421 72421SA030 Hose-heater,outlet 2003-07-01 ~ 2004-06-01; S.LH +W.LH	72421SA030	—
72511D	72511D 72511SA000 DUCT ASSY 2003-07-01 ~ 2004-06-01; S +W	72511SA000	US $37.52
72511E	72511E 72511SA010 DUCT ASSY 2003-07-01 ~ 2004-06-01; S +W	72511SA010	US $37.52
73587	73587 73065AA120 GROMMET DR LNR 2003-07-01 ~ 2004-06-01; *S.(TS+GX+STI).LH +W.(TS+GX).LH	73065AA120	US $5.95
N370031	N370031 902370031 FLG NUT PNT M6 2003-07-01 ~ 2004-06-01; S +W	902370031	from US $0.72
N370031	N370031 902370031 FLG NUT PNT M6 2003-07-01 ~ 2004-06-01; S +W	902370031	from US $0.72
Q586013	Q586013 904586013 TAPPING SCREW 2003-07-01 ~ 2004-06-01; S +W	904586013	US $0.57
Q586013	Q586013 904586013 TAPPING SCREW 2003-07-01 ~ 2004-06-01; S +W	904586013	US $0.57
W170033	W170033 909170033 CLAMP 24 2003-07-01 ~ 2004-06-01; S +W	909170033	from US $1
W230038	W230038 909230038 GROMMET 65X42 2003-07-01 ~ 2004-06-01; S +W	909230038	US $3.82

Heater system (HEATER SYSTEM HOSE&DUCT; S.LH +W.LH; 2000-04-01~) Diagram Subaru IMPREZA Europe 1092377-119848